This rechargeable fan battery with 12V 4.5Ah Ctype lead-acid battery can last up to 35 hours/LED Fan: 3 hours/high 5 hours/low, Charge Time: 12-15hours. Please charge properly before you use it for efficiency and rugged sake. It is also one of the most rugged batteries ever produced. It's reliable, dependable and efficient. It can also be used for various rechargeable lamps, toy cars, toy bicycles, etc that uses 12V batteries. It can work with any rechargeable fan that uses 12v 4.5ah.